Line Differential Protection 7SD52x / 7SD610

1. Line Differential Protection 7SD52x / 7SD610

Power Transmission and Distribution
Line Difeeential Peotection
7SD52x / 7SD610
Peesentation

2. Line differential relays 87L- SIPROTEC 4

Line difeeential eelays 87L- SIPROTEC 4
Univeesal
Line
Difeeential
Relays 87L
- 7SD610
7SD522/523
(2 ends)
7SD522/523
- 7SD522
(2 ends , additional
I/O)
7SD610
- 7SD523
(2 up to 6 ends)
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PTD PA13 7SD52 Present 10/03 No.: 2

3. Customer Benefits

Customee Benefts
The peotection applies its chaeacteeistic by itself. Adaptive
measueement
eeduces the setting complexity and ensuees maximum
sensitivity.
Multi terminal applications up to 6 line ends and
redundant Relay to Relay communication.
A teansfoemee inside the feedee zone of peotection is fully
accommodated by
the feedee difeeential peotection and confgueed with a few
simple settings.
Current transformer mismatch 1:8 without matching transformers.
Different CT classes possible.
Flexible peotection data communication uses a vaeiety of
communication media.
Secure operation at unsymmetrical propagation times in
Communication networks.
High speed measurement supervision
Simplified commissioning by application of WEB- technology
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PTD PA13 7SD52 Present 10/03 No.: 3

4. Hardware options

Device
Current Inputs (Iph / IE)
Voltage Inputs (Uph / UE)
Binary Inputs
Binary Outputs
Life contact
LC Display
Protection Interfaces
7SD610
7SD522
7SD522
7SD523
7SD523
1/3 19’’
½ 19’’
1/1 19’’
½ 19’’
1/1 19’’
(3 / 1)*
3/1
7
5
1
4 Lines
1
(3 / 1)*
(3 / 1)*
3/1
3/1
8
16 // 24
15
(23 //
1
31)**
4 Lines
1
1
4 Lines
1
(3 / 1)*
(3 / 1)*
3/1
3/1
16 // 24
8
(23 //
15
31)**
1
1
4 Lines
4 Lines
2
2
* 1A, 5A changeable (jumper position)
// depending on ordering data
** 5 high-speed relays
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5. Protection and communication join together Three benefits of 87L-SIPROTEC

Peotection and communication join togethee
Theee benefts of 87L-SIPROTEC
Differential protection for the universal
use with easy to handle settings
Two up to six line ends , for serial and parallel
compensated lines, handles transformers and
compensation coils within the protection zone,
tripping time approx. 12 ms with fast high set
element
Adaptive differential measurement
Automatic consideration of CT errors and
communication-errors
Increased set point during switching-on conditions
Direct and modular connection to fibre
optic and digital communication
networks
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6. Main protection function 87: Features of the differential function

Main peotection function 87:
Featuees of the difeeential function
Phase selective multi-end differential protection (2 - 6 ends).
Fundamental vector comparison for the sensitive
trip stage (Setting of IDiff> = 0.2- 0.3 IN).
Suppress decaying DC-components and harmonics.
Therefore allows a sensitive setting.
Tripping time 12 ms with fast current comparison protection
(Setting of IDiff>> > 1.2 ILoad.max)
Dynamic increase of differential set point I Diff> during switch-on
of long lines / cables
CT saturation detector
(only 5 ms saturation free time due to external faults necessary)
Phase selective intertrip
Settable delay time for single phase
faults (feature for inductive compensated networks)
Transformer option: Inrush 2nd harmonic restraint with vector
group adaptation. Undelayed trip for high fault currents
Lockout function (Seal in of trip command)
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PTD PA13 7SD52 Present 10/03 No.: 6

7. Additional functions in the relay

Additional functions in the eelay
Switch On to Fault protection (SOFT)
(with breaker position from remote)
3 stage backup- or emergency O/C protection (IEC /ANSI)
50, 50N, 51, 51N
Runs in parallel (backup) or in emergency mode,
if 87L is blocked. (from external or due to communication-failure)
Three pole and single pole AR (Single pole AR during 2pole fault
without earth possible, Adaptive AR - Switch on from one side)
Breaker Failure protection 50BF
Thermal Overload function (Thermal replica with IOperation)
User definable logic and control functions also with signals from
remote (AND, OR, NOT, Timer, Flip-Flop)
4 remote commands via binary input or logic inputs (destination
relay is addressable), 24 remote signals (only 7SD522/523)
Operational values: Currents I, Voltages V, Active/Reactive Power,
Delay time, Differential-/Restraint current - Remote end I/V-values
Exactly time synchronized fault records with voltages, currents,
binary traces and differential and restraint current per phase
Fast monitoring functions
Fast broken current-wire supervision blocks 87L and avoids
malfunction
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8. Communication features

Flexibility due to plug in modules
Compatibility to international standards
RS232/RS485 electeical
module
System interface
Front interface
DIGSI4
IEC60870-5-103
WEB Monitor
Profibus DP
DNP3.0
Service interface (s)
Fibee-optic module
Time synchronising
DIGSI4 operation
IRIG-B (GPS)
modem connection
DCF77
Optical double-eing module
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PTD PA13 7SD52 Present 10/03 No.: 8

9. IDiff>: Vector comparison

IDif>: Vectoe compaeison
Vector comparison offers high sensitivity for high-resistive faults
DC components and harmonics are suppressed by Advanced Fourier Filters
Suppress decaying DC-component 4 times better then a classical Fourier Filter.
Different types of Ct´s allowed, even with a sensitive setting.
Relative slow, because of 1 cycle (20 ms,50Hz) filtering window
Results in a tripping time from 30-50 ms for high resistive faults (IDiff < 1.2 .. 2 IN)
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10. IDiff>: Vector comparison with Advanced Fourier filters (Basic principle)

IDif>: Vectoe compaeison with Advanced Foueiee
fltees
(Basic peinciple)
samples from
AD-converter
i0
i2
i1
iN
∆t
Optimized filtering coefficients for
7SD52 / 7SD610 designed for suppressing
decaying DC-components 4 times better
then conventional Fourier-filters.
Overcome stability problems with
decaying DC-components
Sine component:
weight
factors
2 N 1
IS sin(ω n Δt) i n 1...N 20
N n 1
Cosine component:
0
1
2
3. ...
N
IC
n
2 i0 i N N 1
cos(ω
n
Δt)
i
n
1...N 20
N 2 2 n 1
Complex vector
I = 2/N ( IC + jIS)
0
1
2
3. ...
I
jIS
N
n
ωt
t= 0
IC
7SD52./610: N=20 samples / cycle
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11. IDiff>: Theory of the classical differential tripping characteristic

IDif>: Theoey of the classical difeeential teipping
chaeacteeistic
I1
I2
εCT
εCT
IC
Assumption: Equal CT type, currents are exactly
synchronized (given through analogue measurement ),
equal CT-ratio
IDif = │I1+I2│
Trip Characteristic
Setting: IDiff> = 2 - 3·IC
or:
0.2 - 0.3· INCT
Idif
slope 2 considers
higher CT-errors
and CT-saturation
(0.4 – 0.6)
Teip Aeea
I1
2.0
εCT,2 ·│I1│
slope 1 considers
linear CT-errors
(0.2 – 0.3)
1.5
I2
1.0
εCT,2·│I2│
εCT,1 · │I1│
0.5
maximum
measurement
error (ε) due to
CT - error
Block Aeea
εCT,1 · │I2│
IDif>
0
0
1.0
2.0
3.0
4.0
5.0
IDiff = IDiff> + εCT ·│I1│ + εCT ·│I2│ (IDIFF> =trip threshold)
IDiff = IDiff> + εCT ·(│I1│+│I2│) = IDiff> + εCT ·│IRest│ 06_A0
6.0
IRest
IRest = │I1│+│I2│
PTD PA13 7SD52 Present 10/03 No.: 11

12. IDiff>: Settings for the “CT – parameters” (1 of 2)

IDif>: Settings foe the “CT – paeametees”
(1 of 2)
Example: CT class 10P10, Sn = 10VA , Isn= 1A
10% tolerance at KSSC (= 10 = kALF_N ) (in case of nominal burden is connected)
k ALF
P Pb
Rct Rb
k ALF _ N ct
k
ALF _ N
Pct Pb'
Rct Rb'
with: KSSC: rated symmetrical short-circuit
current factor (IEC 60044-6)
KALF_N: rated Accuracy Limit Factor
KALF: actual Accuracy Limit Factor
Rct:
secondary winding resistance
Rb :
rated resistive burden
R’b: actual resistive burden (RLEADS + RRelay)
Thumb rule:
Rct 0.1...0.2 · Rb
Nominal burden :
Rb
k ALF
k ALF _ N
S n 10VA
10 Rct 2
I sn2 12 A2
2 10
4
2 1
If less then rated burden is connected to the CT,
the CT- error for load conditions (εLoad) can be used for calculations with
currents higher than the nominal current of the CT (Ipn) !
(In the example here: εLoad could be taken for currents up to 4·Ipn
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PTD PA13 7SD52 Present 10/03 No.: 12

13. IDiff>: Settings for the “CT – parameters” (2 of 2)

IDif>: Settings foe the “CT – paeametees”
(2 of 2)
As the IDif> step must be (veey) sensitive foe high
eesistive faults at
maximum Load, foe usual applications theee is no need to
set the
paeametee 0251 (kALF/KALF_N) highee than 1.5 !!
Resulting Relay Parameter (with exact calculation)
kALF / kALF_N = 1.5
(calculation as above = 4 , 4 > 1.5 Setting: 1.5)
[remains 1 if CT-data's are unknown]
IEC 60044 -1:
tolerance in load area up to kALF / kALF_N : <2% for 5P (TPY), <3% for 10P (TPX) Ct´s
Recommended setting in the relay:
3% for 5P, 5% for 10P
total error at accuracy limit k ALF_N = 5% for class 5P and 10% for class 10 P
Recommended setting in the relay:
10% for 5P, 15% for 10P
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14. IDiff>: Approximation of the CT- error

IDif>: Appeoximation of the CT- eeeoe
Basis foe the adaptive eesteaint cueeent calculation (max. expected
difeeential cueeent due to CT-eeeoes) is the estimated eeeoe of each CT
feom the CT-data's
Settings in
DIGSI 4
ε
in % of INCT
50
Example: CT class 5P5
10VA, Rct = 2Ω, Isn = 1A
40
εLoad < 2%, εFault at kALF_N = 5%
actual burden Rb’ = 60% of Rb
30
25
0254 = 10%
20
Max. error of
the real CT
0253 = 3%
10
5
3
0
0
1
1.5
2
k ALF
1.5 0251 1.5
k ALF_N
3
4
5
kALF_N
06_A0
6
7
7.5
kALF
8
I1
I NCT
PTD PA13 7SD52 Present 10/03 No.: 14

15. IDiff>: Example for a setting at nominal current

IDif>: Example foe a setting at nominal cueeent
Assumption: CT-ratio is 100/1A, real error of Ct´s is 2% (0.02) up to 1.5 INCT
I1 =100.5A
I2 = -100A
εCT1=0.02
εCT2 = -0.02
IC =10 A
maximum
measurement
error
IC
I2 = - 0.98 A
I1 =1.02 A
I1
Idif
=│I1+I2│
CT- error for
1.5·INCT I kALF·INCT (10%)
Teip Aeea
0.6
0.4
max. CT-error for
I < 1.5 INCT ( 5%)
0.35
0.05
0.05
IDiff> = 0.25
=2.5·IC 0.2
0
0
0.5
1.0
1.5
2.0
IError maximum
estimated
error at
INCT
2.5
Block
Aeea
I2
3.0
IRest
=│I1│+│I2│
Diff. due to charge + real CT error:
I Diff = 0.1 A + 0.02 • │1A│+ 0.02 ·│1A│ = 0.14 A
Max. estimated error = Restraint current : I Error = 0.25 A + 0.05 • (│1A│+ │1 A│) = 0.35 A
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PTD PA13 7SD52 Present 10/03 No.: 15

16. IDiff>: Adaptive differential relaying Restraint current with consideration of the CT- errors

IDif>: Adaptive difeeential eelaying
Resteaint cueeent with consideeation of the CTeeeoes
Same example as before! Assumption: Currents are exactly
synchronized Teip Chaeacteeistic 7SD52x / 7SD610
IDif
maximum
measurement
error
IC
Teip
Aeea
I1
0.4
Fixed 45° slope –
no slope settings required
0.3
IDif>
Maximum allowed
differential current
without trip:
IDiff = 0.35 A
0.2
0.1
Estimat.
CTerror
0.1A
Block
Aeea
I2
0
0
0.1
0.2
0.3
0.4
0.5
∆IRest
IDif = │I1+ I2│
Current summation:
Max. error summation:
IEeeoe = ∆IRest*) = IDif> + εCT1 ·I1 + εCT2 ·I2 = IDif> + estimated CT- eeeo
*) ∆IRest = adaptive eesteaint
cueeent
Trip, if differential current IDiff exceeds the
restraint current (max. error)
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PTD PA13 7SD52 Present 10/03 No.: 16

17. IDiff>: New differential method compared with a classical differential characteristic

IDif>: New difeeential method compaeed with a
classical difeeential chaeacteeistic
Assumption: Equal Ct´s on both side, no effects from comms-system, standard settings
- Rated burden connected at the Ct´s
- Less then rated burden connected (k ALF/ kALF_N = 2)
Trip Characteristic
Idif
Teip Aeea
2.0
classical
characteristi
c
Gain of
sensitivity
1.5
Trip
characteristic
with rated
burden
1.0
0.5
IDiff> = 0.3
0
Trip characteristic
with kALF/ kALF_N = 2
0
1.0
2.0
3.0
4.0
5.0
Block Aeea
6.0
IRest
Classical: IDiff = 0.3 + 0.25·IRest = 0.3 + 0.25·2 = 0.8 (sensitivity under full load)
New:
IDiff = 0.3 + 0.05·IRest = 0.3 + 0.05·2 = 0.4 (double sensitivity under full load)
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PTD PA13 7SD52 Present 10/03 No.: 17

18. IDiff>: Example 1: Adaptive (self-) restraining

IDif>: Example 1: Adaptive (self-) eesteaining
5P20, 20 VA
1600/1A
kALF/ kALF_N = 5 **)
εLoad = 3% (0.03)
εFault = 10% (0.1)
800 A
4800 A
IC = 100 A
10P10, 10 VA
400/1A
kALF/ kALF_N = 1
εLoad = 5% (0.05)
εFault = 15% (0.15)
5P20, 20 VA
1600/1A
kALF/ kALF_N = 2 **)
εLoad = 3% (0.03)
εFault = 10% (0.1)
IN = 1600 A
1200 A
5600 A
400 A
800 A
**) Settings for this example.
In a real case both settings would
be 1.5
IDiff> = Differential-Setting = 2.5 · IC = 250 A
∆IRest = IDiff> + sum of estimated Ct- errors
IDiff = Differential current due to vector summation of the individual currents
Case 1 (normal operation)
∆IRest = 2.5·100A + 0.03·800A + 0.03·1200A + 0.05·400A = 330A
∆IRest / IN = 0.206
IDiff = 100 A (=IC)
IDiff / IN = 0.0625
Case 2 (External Fault)
∆IRest = 2.5·100A + 0.03·4800A + 0.1·5600A + 0.15·800A = 1074A
IDiff = 40 A (due to lower voltage)
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∆IRest / IN = 0.671
I Diff / IN = 0.025
PTD PA13 7SD52 Present 10/03 No.: 18

19. IDiff>: CT- saturation detector based on harmonic analysis of the current wave form - Signal analysis

IDif>: CT- satueation detectoe based on haemonic
analysis
of the cueeent wave foem - Signal analysis
Differential Current due to saturation
I1
I2
- Wave form detector recognize saturation from
DC, f2, f3, f4, f5…. rated to the fundamental f1
Factor = 1 - no saturation
Factor > 1 - saturation Increase of CT- error with a factor fSat.
Results in higher restraint current.
More differential current is required for tripping.
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PTD PA13 7SD52 Present 10/03 No.: 19

20. IDiff>: Adaptive differential relaying Consideration of nonlinear CT- errors due to saturation

IDif>: Adaptive difeeential eelaying
Consideeation of nonlineae CT- eeeoes due to
satueation
I1
I2
IDif
Externa
l
Fault
Trip Characteristic 7SD52x / 7SD610
Maximum
I1 measurement
Teip Aeea
Tripping
threshold
without
saturation
IDif>
Increased tripping
threshold with
saturation.
Required fSat is
calculated from the
wave-form, so the
diff. current caused by
saturation does not lead
to a malfunction of
the relay.
error (ε) due to
normal
CT - error
I2
Block-Aeea
0
∆IRest
0
IDif = │I1+ I2│
Current summation:
Max. error summation:IEeeoe = ∆IRest = IDif> + εCT1 ·I1 + fSat· εCT2 ·I2
Maximum
measurement
error (ε) due to
saturation. Higher
CT - error
Trip, if differential current exceeds the estimated error (= increased restraint)
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PTD PA13 7SD52 Present 10/03 No.: 20

21. IDiff>: Test: max. asymmetrical offset , Ct saturation

IDif>: Test: max. asymmeteical ofset , Ct satueation
I1
I2
Settings:1210/13
0251
0253
0254
Externa
l
Fault
10·INCT
0.30 A
1.0
5%
15 %
(K1:iE = -K1:iL1)
≈3.5
A
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PTD PA13 7SD52 Present 10/03 No.: 21

22. IDiff>: Adaptive consideration of a permanent time difference in transmit- and receive direction

IDif>: Adaptive consideeation of a peemanent time
difeeence
in teansmit- and eeceive dieection
I1
I2
IC 0
I1
Δt 360
(50Hz)
20ms
0.2ms 360
here : ΔΦ sync
3.6
20ms
3.6 2π
0.06283
360
ΔI sync ΔΦ sync I sync ΔΦ sync I 2
ΔΦ sync
2.0 ms
2.2 ms
Average delay 2.1 ms
∆Isync
due to
different times
in transmit- and
receive direction
3.6°
(For more details:
refer to 7SD52
Synchronisation)
06_A0
I2
PTD PA13 7SD52 Present 10/03 No.: 22

23. IDiff>: Adaptive consideration of a permanent time difference. Total “Restraint Current”

IDif>: Adaptive consideeation of a peemanent time
difeeence.
Total “Resteaint Cueeent”
Trip Characteristic 7SD52x / 7SD610
IDif
Teip
Aeea
0.3
IDif>= 0.2
Block Aeea
0.1
CTerrors
∆Isync
0
0
0.1
0.2
0.3
∆IRest
Diff. current:: IDiff = IC + ∆Isync
Rest. current: ∆IRest = IDiff> + CT-errors + ∆Isync
Total “Resteaint Cueeent”:
∆IRest = IDif> + fSat1· εCT1 ·I1 + fSat2· εCT2 ·I2 + ∆Isync
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PTD PA13 7SD52 Present 10/03 No.: 23

24. IDiff>: Sliding data windows after fault inception

IDif>: Sliding data windows aftee fault inception
faultinception
20 ms Vector comparison (IDiff>) data windows
Aftee fault inception the IDif> step will set it’s values foe seveeal data windows to zeeo,
but it not blocks!
5 ms Fast current comparison (QDiff) data windows
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PTD PA13 7SD52 Present 10/03 No.: 24

25. IDiff>> (QDiff) : Fast current comparison

IDif>> (QDif) : Fast cueeent compaeison
Fast Current comparison offers high speed tripping and a fast decision
for internal or external fault condition
Current comparison step doesn't suppress DC-components and harmonics.
(simple integration)
Therefore recommended setting is > ILoad,max (1.2 - 2 IN).
Current comparison decides in 5 ms for internal or external faults (5 ms window)
Internal: Immediate trip command (trip time typical 12 ms for 2 or 3 end topology)
for differential currents IDiff > 1.2 - 2 IN
External: If IFault > 2.5·IDiff>> setting: immediate blocking of the
current comparison.
Reason: CT-saturation possible. Avoids any risk for stability due to
differential current from current comparison.
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PTD PA13 7SD52 Present 10/03 No.: 25

26. IDIFF>> (QDiff) : Fast current comparison algorithm (Basic principle)

IDIFF>> (QDif) : Fast cueeent compaeison algoeithm
(Basic peinciple)
Setting IDiff>>: > ILoad,max
Q2
Q1
Trip Characteristic 7SD52x / 7SD610
QDif =
│Q1+Q2│
Teip Aeea
Summated current
calculation Q by means
of numerical integration
Block Aeea
Settable pick-up value
IDif>>
Q1
Q3
Q2
0
t0
t1
t2
t3
t4
t5
Current Measuring window
5 ms (50 Hz)
Corrected time
instants
after end-to-end time
synchronisation
t6
0
∆QRest
Calculated restraint values from CT-errors
(always higher CT-error is taken).
Similar principal as vector comparison for
restraint current calculation.
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PTD PA13 7SD52 Present 10/03 No.: 26

27. CT- requirements , mismatch of the primary CT currents

CT- eequieements , mismatch of the peimaey CT
cueeents
1200/1A, 10P10, 10VA
Rct = 2.5Ω, R‘b = 1.1Ω
(kALF = 34.7, k’n = 8.33)
150/5A, 5P20, 50VA
Rct = 0.25Ω, R‘b = 0.4Ω
(kALF = 69, k’n = 66.6)
VT option
Not required for
differential function
87L
50/51
50 BF
49
IP = 10 kA
k 'n
k ALF k ALF_N
Mismatch of the primary CT currents:
R ct R b
R ct R 'b
I CTprim(max)
I CTprim(min)
IP
I NCTprim
IP = Primary
Symmetrical
Short circuit
Current
8
1A or 5A input selectable in the relay
CT data's / errors are set in the relay and automatically considered in the
restraint current calculation
CT-requirements:
1st condition:
kALF > k’n
2nd condition:
kALF ≥ 30 or ¼ AC cycle saturation free time (5ms for 50Hz)
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PTD PA13 7SD52 Present 10/03 No.: 27

28. Application - Transformer and line/cable in the protection zone

Application Teansfoemee and line/cable in the peotection zone
20 MVA, 110 kV/20 kV, YNd1
10P10, 10 VA, 200/1A
2 km
10P10, 10 VA, 500/5A
∆
87T
50/51
50 BF
49
trip
command
Settings of the transformer winding data's in each relay
with vector group matching, ratio adaptation and zero sequence elimination
Diferential set point is rated to the nominal current of the transformer
Inrush restraint with second harmonic included (time limit for Cross block)
High set element for immediate trip (12 ms) through
heavy internal fault currents
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PTD PA13 7SD52 Present 10/03 No.: 28

29. Examples for different Topologies

Examples foe difeeent Topologies
7SD
523
7SD
522
7SD
523
7SD
523
7SD
523
7SD
522
7SD
523
7SD
522
7SD
523
7SD
523
7SD
523
7SD
522
Chain topology
with line in the
protected zone
Ring topology
with line in the
protected zone
06_A0
Chain topology
with transformer
in the protected zone
PTD PA13 7SD52 Present 10/03 No.: 29

30. Relay to Relay Communication Designed for the use of Digital Communication Networks and FO 1)

Relay to Relay Communication
Designed foe the use of Digital Communication Netwoeks and
FO 1)
Main featuees of the eelay to eelay
communication
Synchronous data exchange with HDLC- protocols
Very save through 32 bit CRC-checksum
Permanent supervision of the data transmission
Indication of disturbances and loss of connection
Measurement and compensation of the telegram delay time
Max. 30 ms per connection, automatic adaptation in that range
Immediate detection of delay time changes through switching effects
Monitors availability of the data connection
Easy settings according the data link (FO or comms-system)
(N·64 kBit/s, N settable from 1 - 8 for comms-system, N=8 for FO)
Communication device addresses
Protection devices are clearly assigned to a defined protection
section. Each relay knows the addresses of remote.
Detection of reflected telegrams in a loop back in a
comms- network - Immediate blocking of 87L function
1)
Fibre optic cables
Option: Microsecond exact time synchronisation
via GPS 1s pulse input
Independent measurement of transmit and receive delay time
Hardware prepared for this feature
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PTD PA13 7SD52 Present 10/03 No.: 30

31. Relay to Relay Communication (Overview)

Relay to Relay Communication (Oveeview)
side 2
side 1
or
E
O
E
O
E
O
CommunicationSystem
O
E
or
O
ISDN
E
or
Two (copper-) wires
O
7SD52x / 610
7SD52x / 610
FO
E
Communication according existing possibilities,
the relay remains the same !
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PTD PA13 7SD52 Present 10/03 No.: 31

32. Relay to Relay Communication - Communication modules, Protection Interface (PI)

Relay to Relay Communication
- Communication modules, Peotection Inteeface (PI)
Options for the Protection Interface
FO 5
O
1.5 km
ST820 nm
connector
Multimode
internal
FO 6
O
3.5 km
ST820 nm
connector
Multimode
Protection interface 2
Port E
internal
(7SD523 only)
Remote line end 2
Synchronous N x 64kB/sec
FO 7
O
10 km
ST1300 nm
connector
Monomode
Protection interface 1
internal
FO 8
O
Plug in
modules
Port D
35 km
FC1300 nm
connector
Monomode
Remote line end 1
Synchronous N x 64kB/sec
internal
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PTD PA13 7SD52 Present 10/03 No.: 32

33. Relay to Relay Communication - Communication converter

Relay to Relay Communication
- Communication conveetee
FO – Communication Net
7XV5662-0AA00
FO 5 820nm
E
O
X.21
or
G703.1
FO - ISDN
7XV5662-0AB00
FO 5 820nm
E
O
ISDN
FO – Copper wires
7XV5662-0AC00
FO 5 820nm
E
Copper
O
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PTD PA13 7SD52 Present 10/03 No.: 33

34. Relay to Relay Communication - Application: Fibre optic connection

Relay to Relay Communication
- Application: Fibee optic connection
Direct connection with fbre optic (FO) cables
- Ofers high speed tripping (12 ms), baud rate is 512 kBit/s
- Flexible plug in modules for diferent fbre cables or distances
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PTD PA13 7SD52 Present 10/03 No.: 34

35. Relay to Relay Communication - Application: Digital communication network

Relay to Relay Communication
- Application: Digital communication netwoek
Connection via a communication system with multiplexer
- Automatic delay time measurement (adaptive correction from 0 ms - 30 ms)
- Immediate detection of split-path condition in the transmit or receive path
- Communication addresses clearly identify the relays
Synchronous electrical interface
X.21 (64/128/512 kBit/s) or G703.1 (64 kBit/s)
E
O
Communicationsystem
FO 5, 820 nm, 1.5 km
O
E
Communication converter
7XV5662-0AA00
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PTD PA13 7SD52 Present 10/03 No.: 35

36. Relay to Relay Communication - Application: ISDN network

Relay to Relay Communication
- Application: ISDN netwoek
Connection via an ISDN Network
- Automatic delay time measurement (adaptive correction from 0 ms - 30 ms)
- Immediate detection of split-path condition in the transmit or receive path
- Communication addresses clearly identify the relays
Synchronous electrical interface
S0 interface (2·64kBit/s)
E
O
FO 5, 820 nm, 1.5 km
ISDN
O
E
Communication converter
7XV5662-0AB00
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PTD PA13 7SD52 Present 10/03 No.: 36

37. Relay to Relay Communication - Application: Leased telephone line or Pilot wire (1 of 2)

Relay to Relay Communication
- Application: Leased telephone line oe Pilot wiee
(1 of 2)
Leased telephone line (standby or dial-up)
- 2 wire telephone cable (max. 8 km)
E
O
Twisted telephone pair
max. 8 km (5 miles)
FO 5, 820 nm, 1.5 km
O
E
Communication converter
7XV5662-0AC00
5 kV insulation
integrated,
20 kV Isolationtransformer
7XR9516 available!
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PTD PA13 7SD52 Present 10/03 No.: 37

38. Relay to Relay Communication - Application: Leased telephone line or Pilot wire (2 of 2)

Relay to Relay Communication
- Application: Leased telephone line oe Pilot wiee
(2 of 2)
Serial communication
New technology on existing (copper-) connection
Side 1
Side 2
Before:
Transmission of analogue values
via:
2 core pilot wire
3 core pilot wire
Now:
E
O
O
Digital Transmission,
Telegrams via
E
2 core pilot wire
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PTD PA13 7SD52 Present 10/03 No.: 38

39. Relay to Relay Communication - Application for a three terminal configuration with 7SD523

Relay to Relay Communication
- Application foe a theee teeminal confgueation with
7SD523
Monomode fibre optic cable up to 10 km
(1300 nm module)
ST-connector
Monomode fibre optic cable up to 35 km with 1300 nm interface
- Mixed configurations possible (FO and comms-network)
- Ring offers redundant differential system
(switching from ring chain takes 200 ms)
- Exact time tagging in each relay (resolution 10 µs)
- VT inputs as standard
Distance relay
7SA52
(87 function requires only Ct´s)
- Connection to a comms-system with a device
provided by SIEMENS
820 nm
max.
1.5 km
Option:
GPS-Time
synchronisation
e
o
X21
G703.1
PCM
multiplexer
SDH
comms-network
PCM
multiplexer
o
e
STconnector
Communication converter
G703.1: 64 kBit
X21: N·64 kBit (1≤N≤8)
7XV5662-0AA00
06_A0
FCconnector
Option:
GPS-Time
synchronisation
PTD PA13 7SD52 Present 10/03 No.: 39

40. Relay to Relay Communication - Ring- and Chain topology, loss of one data connection tolerated

Relay to Relay Communication
- Ring- and Chain topology, loss of one data connection
toleeated
Automatic changeover from
closed ring- to chain topology,
if case of one connection is
lost or not available
side 2
side 2
I2
side 3
I3
side 3
I2
I3+ I1
Connection to
further
Diff. relays
I3
I2
I1+ I2
I3
I1
I1
I3+ I1
I1+ I2
side 1
side 1
Closed ring
Partial current summation
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PTD PA13 7SD52 Present 10/03 No.: 40

41. Relay to Relay Communication - Hot - Standby connection in a two terminal configuration

Relay to Relay Communication
- Hot - Standby connection in a two teeminal
confgueation
Commsconverter
Loss of main
connection
side 2
FO5 62.5/125 um
Commsconverter
FO5 62.5/125 um
X21 or
G703.1
I2
Hot standby
connection.
Permanent
supervision.
Commsnetwork
Direct FOconnection.
Main
connection
512 kBit/s
for the 87L
function
I2
Main
connection
is interrupted
I1
side 1
Closed ring
Hot standby
connection
active now
for 87 L.
Switchover
takes 20 ms
X21 or
G703.1
(64 kBit/s)
Commsnetwork
side 2
I1
Main connection side 1
re-established
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PTD PA13 7SD52 Present 10/03 No.: 41

42. Commissioning and operating aids (1 of 5)

Commissioning and opeeating aids
(1 of 5)
WEB-Technology
Access to the relay with a WEB Monitor
Help system in
INTRANET / INTERNET
http://www.siprotec.com
The homepage of the relay
is:http://141.142.255.150
IP-address is set with DIGSI 4
on front- or rear service port
WEB server in the relays
firmware
1. Serial connection
Direct or via modem with a
standard DIAL-UP Network
Server sends it´s HTML-pages
and JAVA-code to the WEB Monitor
after a DIAL-UP connection
2. HTML page view in a WEB Monitor
with the IP-address of the relay
http://141.142.255.150
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PTD PA13 7SD52 Present 10/03 No.: 42

43. Commissioning and operating aids (2 of 5)

Commissioning and opeeating aids
(2 of 5)
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PTD PA13 7SD52 Present 10/03 No.: 43

44. Commissioning and operating aids (3 of 5)

Commissioning and opeeating aids
(3 of 5)
06_A0
PTD PA13 7SD52 Present 10/03 No.: 44

45. Commissioning and operating aids (4 of 5)

Commissioning and opeeating aids
(4 of 5)
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PTD PA13 7SD52 Present 10/03 No.: 45

46. Commissioning and operating aids (5 of 5)

Commissioning and opeeating aids
(5 of 5)
06_A0
PTD PA13 7SD52 Present 10/03 No.: 46